2013 ◽  
Vol 860-863 ◽  
pp. 3031-3034
Author(s):  
Jian Xun Qi ◽  
Zhi Nan Kan

As the particularity of power engineering projects, in order to achieve great economic and social benefits as soon as possible, the owner often add reward or punishment factor on the power project construction schedule management. This paper improved the presentation of decision critical method (DCPM), using a simple arrow to present multi decision of a decision-making activity, similarly as PERT network. This paper introduce the concept of virtual expense ratio of different decisions, on the base of which combined the reward coefficient b and penalty coefficient a as well as the real project completion time T and the target completion time D. A new heuristic rule was proposed, not only takes the cost of different decisions but also considers the relations of real project completion time T and target completion time D. Thus, the new heuristic rule enjoys broader application than previous methods. The new calculation procedure is given, broad the application range of DCPM, and affords an effective new and practical method to help solving power project construction schedule management problem.


2020 ◽  
Vol 165 ◽  
pp. 06055
Author(s):  
Ru Wang ◽  
Jing Lian

Considering multiple possible scenarios in the process of project construction, the prefabricated project scheduling problem is studied in combination with the theory of multi-mode resource-constrained project scheduling problem. Multi-objective multi-mode resource-constrained project scheduling model with time/robustness trad-offs was constructed. Next, the adjusted non-dominated genetic algorithm (NSGA-II) was designed to solve the model. Finally, the proposed model and algorithm were implicated to a real project, in order that research achievement can guide managers to make decisions and invest resources scientifically and reasonably.


2014 ◽  
Vol 548-549 ◽  
pp. 1646-1650 ◽  
Author(s):  
Yang Liu ◽  
Yan Li

It has been proved that the construction schedule management was an uncertain problem. Traditional CPM method was a good way to define the total duration and critical paths but can not solve uncertainty. The paper use CPM to define the duration and critical path firstly, then defined the parameters with Delphi and make Monte Carlo simulation. Through simulation results, it is found that the probability to finish the work on time was only 35.3%. The following step is to make sensitivity analysis, through the calculation, the work which has large influence was found and treat as key control points. It is proved that Monte Carlo simulation is useful to solve the problem of construction schedule management.


Author(s):  
Xiaopeng Fang

The construction of AP1000 Nuclear Power Plant (NPP) has commenced in China. The AP1000 NPP features a passive design concept and modular construction technology. Based on the management of the construction of current AP1000 NNP, this paper describes the effects on Nuclear Island (NI) construction project management resulting from modular construction technology, as well as new construction techniques and methods. This paper puts forward new requirements for construction schedule management of the nuclear island construction at different levels. The AP1000 NI construction logic features the parallel construction of civil and structural erection as the main approach, with the integrated schedule of module fabrication, assembly and installation as support.


Author(s):  
Zhiyou Sun ◽  
Hongwei Shen

Confined space can be defined as closed or semi-closed equipments, facilities and places which potentially have poor ventilation, poisonous and hazardous gases or poor oxygen. Confined space has complex working environment and more hazardous factors which makes safety accidents occurred frequently. Modularized Construction, as the typical feature of AP1000 nuclear project construction, shortens the construction schedule but increases safety risk, since there is more confined space and cross work, especially in the Containment building after the setting of CVTH. This thesis analyses the confined space construction feature of the containment building and emphasizes the necessity of ventilation and fume control. Some ventilation methods have been taken on site which has effectively reduced the construction risk inside containment buildings. Therefore, this thesis has practical value for the consequent AP1000 project construction.


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